Rough idle and stalling
Stellar HDF Member
Joined: Dec 2009
Posts: 2,489
Likes: 1,017
From: Osoyoos B C Canada
how many miles on the bike ,plugs , wires fretting at the throttle body are a couple of thoughts
Dave
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
Likes: 173
From: Simi Valley, CA
Check your clutch switch. See if it starts in gear with the clutch disengaged. If not, that is a likely cause.
Here's a thread discussing the issue on newer M8s, but I think it would also apply to yours... https://www.hdforums.com/forum/milwa...talling-7.html
Here's a thread discussing the issue on newer M8s, but I think it would also apply to yours... https://www.hdforums.com/forum/milwa...talling-7.html
Intermediate
Joined: Nov 2016
Posts: 43
Likes: 0
From: Australia
No apologies necessary and thank-you , Now re your bike , I get the impression that the bike starts and idles ok but problem is when the bike is warmed up so we are looking for something temp related ?
how many miles on the bike ,plugs , wires fretting at the throttle body are a couple of thoughts
Dave
how many miles on the bike ,plugs , wires fretting at the throttle body are a couple of thoughts
Dave
Bike starts and runs fine other than at idle. It's not temp related IMHO. Bike is 16 K miles. Plugs, wires etc good. No issue with wiring around throttle body. I will try some of the suggestions offered and report back. Cheers and thanks.
Intermediate
Joined: Nov 2016
Posts: 43
Likes: 0
From: Australia
Have you checked for error codes ? Check and post back , could be Temp sensor or crank case sensor , or possibly just bad gas .
https://www.fuelmotousa.com/p-29661-...M%20XL%201200C
https://www.fuelmotousa.com/p-29661-...M%20XL%201200C
I just ran through a similar problem with my FXDL (would stall at idle after warming up w/ no DTCs) and found this thread in the Dyna forum:
https://www.hdforums.com/forum/dyna-...l#post18781779
My solution appears to have been cleaning the IAC.
https://www.hdforums.com/forum/dyna-...l#post18781779
My solution appears to have been cleaning the IAC.
Intermediate
Joined: Nov 2016
Posts: 43
Likes: 0
From: Australia
Everything that has been suggested has drawn a blank. Only code thrown is the common 1475 exhaust actuator. I think it may be a faulty MAP or TPS. Has anyone ever experienced a fault with these? Any other suggestions on what could be the issue?
Last edited by Big_Dave88; Jan 7, 2020 at 05:09 PM.
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Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Just for curiosity sake , pull your crank case sensor and give it a good cleaning , I have heard that they can give false readings when they get gummed up , cleaning it may improve idle . It's right beside the oil filter and is easy to get to and should only take a minute to do . I may be wrong , but it only takes a minute .
Since I'm not familiar with the Rushmore , I'm wondering if it has the little port inside the throttle body . When you say it's clean , did you spray carb cleaner into that port to get dirt and crud out ? You could be correct on the faulty IAC .
Have you done a fuel pressure test ? Although , if it were a bad fuel line inside the tank , I would think you would feel it while you were riding and at wot .
Since I'm not familiar with the Rushmore , I'm wondering if it has the little port inside the throttle body . When you say it's clean , did you spray carb cleaner into that port to get dirt and crud out ? You could be correct on the faulty IAC .
Have you done a fuel pressure test ? Although , if it were a bad fuel line inside the tank , I would think you would feel it while you were riding and at wot .
Grand HDF Member
Joined: Jan 2012
Posts: 4,458
Likes: 2,876
From: Oklahoma
I might be mistaken, but I don't believe there is an IACV on anything newer than somewhere around 06 or 07. There is an inlet air temp sensor that might be all sludged up with blow by oil and cleaning that wouldn't hurt anytime. A couple of free things to try since nothing else has worked, cycle the ignition (with the run switch ON) slowly 4 times. Some wait for the fuel pump to stop each time, but a little more rapid than that has worked for me. That resets the idle reference in the computer if it has gotten messed up from holding the front brake at shut down. Frequently that rolls the throttle slightly forward and that messes up the idle reference. The other, disconnect and reconnect the fuel line quick disconnect on the bottom of the gas tank. On rare occasions, the check valve partially or fully closes off the fuel flow and reconnecting the fuel line seems to correct that. If none of this works either, sounds like a trip to the shop for some professional trouble shooting. I don't know how to test the engine temp sensor or the crank shaft position sensor that also might contribute to this.